Electrochemical baffle plate device and method for uranium-containing wastewater treatment and uranium recovery

Abstract

The invention relates to the technical field of water pollution prevention and control and the technical field of new energy, and discloses an electrochemical baffle plate device and method for uranium-containing wastewater treatment and uranium recovery. The device comprises a reactor box body, the reactor box body is divided into a plurality of compartments by electric baffle plates, and each compartment is internally provided with a pair of cathode and anode electric baffle plates; and the cathode and anode electric baffle plates are respectively fixed through an electrode groove in a waterproof manner. The baffle plates divide the box body into a plurality of compartments, each compartment is divided into an upper flow chamber and a lower flow chamber, and the cathode and anode baffle plates are connected with an adjustable power supply through wires. Single-chamber dual-electrode electrochemical reaction is used as a basic unit, specific adsorption of a functionalized electrode material and an electrochemical in-situ reduction function are efficiently coupled through electrode material modification, electrode configuration design and electrode arrangement optimization, meanwhile, electrodes are embedded in a matrix mode, a diversion function is achieved, and the electrochemical in-situ reduction function is achieved. And efficient removal and resource recovery of uranium ions in the wastewater are realized.

Description

Technical Field

[0001] The invention relates to the technical fields of water pollution prevention and control and new energy technology, and in particular to an electrochemical baffle device and method for treating uranium-containing wastewater and recovering uranium. Background Art

[0002] As global nuclear power generation continues to grow, the demand for nuclear fuel uranium (U) is also increasing, and uranium mining has become a global expansion industry. However, during the mining, smelting and purification of uranium, the discharge of a large amount of uranium-containing wastewater has caused serious environmental problems. If these wastewaters are not properly treated, they will cause serious pollution to the ecological environment and pose a major threat to public health, while also leading to a waste of precious uranium resources.

[0003] The current uranium-containing wastewater treatment technology mainly relies on physical, chemical and biological methods. The physical adsorption method uses materials with strong adsorption capacity to enrich and fix uranium ions in uranium-containing wastewater. The operation is simple, but the adsorbent is expensive and the regeneration cost is high; the membrane treatment technology has the characteristics of good effluent quality and stable and reliable operation, but this method has high requirements for the quality of the treated wastewater. It usually requires pretreatment of large particles and some high-concentration ions in the wastewater, otherwise it will cause membrane pollution, decreased permeation flux and even membrane damage. The cultivation of specific microorganisms in the biological method has very strict requirements on environmental conditions, and has the disadvantages of large land occupation, complex management, and unstable wastewater compliance; the ion exchange method has a wide pH range and high selectivity, but there are problems of material inactivation and hardening, and a large amount of radioactive waste resin will be produced. Chemical precipitation treatment is to add flocculants to uranium mine wastewater to combine uranium ions in the wastewater with the input chemical substances. The process is simple and the operating cost is low, but after precipitation treatment, a large amount of uranium-containing waste residue is produced, causing secondary pollution. Therefore, it is urgent to develop a new technology for the treatment of uranium-containing wastewater with high efficiency and low carbon.

[0004] Electrochemical treatment technology has shown broad application prospects in the field of uranium-containing wastewater treatment due to its high efficiency, low energy consumption and low pollution. Hexavalent uranium is more mobile than tetravalent uranium. Using appropriate reducing agents to reduce hexavalent uranium in solution to tetravalent uranium precipitate is one of the main methods for treating uranium-containing wastewater. The electrochemical method achieves the purpose of removing and recovering uranium by introducing current into the electrode, causing a reduction reaction at the cathode to deposit uranium on the electrode. The electrochemical method has a fast processing speed and is pollution-free. However, in practical applications, this technology still faces bottlenecks such as low ion selectivity, limited electrode adsorption capacity, and unstable treatment process, which limit its promotion and application. Summary of the invention

[0005] The purpose of the present invention is to provide an electrochemical baffle device and method for treating uranium-containing wastewater and recovering uranium, which realizes efficient removal and resource recovery of uranium ions by organically coupling the specific adsorption of amide oxime modified electrode materials with the electrochemical in-situ reduction process. At the same time, an intelligent control system is integrated, using electrochemical sensing technology, online water quality monitoring and electrode morphology visualization monitoring technology to ensure that each pair of electrodes is always in the best working state, and relying on the intelligent management and control platform for real-time control to ensure the optimal operating state of the treatment process.

[0006] In order to achieve the above purpose, the technical solutions adopted are as follows:

[0007] In a first aspect, an electrochemical baffle device for treating uranium-containing wastewater and recovering uranium comprises a reactor housing, an electric baffle and an adjustable power supply;

[0008] At least one pair of electric baffles is arranged in the reactor box to separate the reactor box into a plurality of interconnected compartments, and each compartment is provided with a sample outlet;

[0009] The electric baffle comprises a cathode baffle and an anode baffle, wherein the cathode baffle divides the compartment into an upstream chamber and a downstream chamber; a modification layer is arranged on the cathode baffle, and the modification layer is used for directional adsorption of uranyl ions; a brush roller is arranged corresponding to the cathode baffle;

[0010] A water inlet and a reflux port are arranged at one end of the reactor box, and a water outlet is arranged at the other end, and the reflux port is connected to the bottom of the water outlet side of the reactor box through a reflux pipeline;

[0011] The adjustable power supply is electrically connected to the cathode baffle and the anode baffle.

[0012] Preferably, in the above-mentioned electrochemical baffle device for treating uranium-containing wastewater and recovering uranium, the modified layer is an amide oxime layer.

[0013] Preferably, in the above-mentioned electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery, a cathode slot and an anode slot are arranged on the inner side wall of the reactor box; wherein the cathode baffle is movably arranged in the cathode slot, and the anode baffle is movably arranged in the anode slot.

[0014] Preferably, in the above-mentioned electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery, a cathode rail is provided inside the reactor box, and a plurality of cathode baffles are movably assembled on the cathode rail, and the volume ratio of the upstream chamber and the downstream chamber is adjusted by adjusting the position of the cathode baffle.

[0015] Preferably, in the above-mentioned electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery, the adjustable power supply is arranged on the top of the reactor box, and is connected to the cathode baffle and the anode baffle through the wire holes arranged on the reactor box, and the adjustable power supply is used to adjust the voltage of each pair of electrodes. The cathode baffle and the anode baffle included in a pair of electric baffles constitute the pair of electrodes.

[0016] Preferably, in the above-mentioned electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery, a current recorder is arranged on the loop formed by each pair of electrodes, the cathode baffle is connected to a potential recorder, and the upstream chamber is connected to a conductivity meter and a pH meter.

[0017] Preferably, the above-mentioned electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery also includes a power flow component, which is arranged corresponding to the water inlet, water outlet and return pipeline, and is used to provide power for water inlet, water outlet and return flow respectively and collect water inlet, water outlet and return flow, and the power flow component includes a peristaltic pump and a flow meter.

[0018] Preferably, in the above-mentioned electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery, it also includes a thermometer and a control module, the probe of the thermometer is arranged inside the reactor box, the signal output ends of the thermometer, flow meter, current recorder, potential recorder, conductivity meter and pH meter are connected to the signal input end of the control module, the signal output end of the control module is connected to the signal input end of the adjustable power supply and the peristaltic pump, and the control module is used to:

[0019] Acquire real-time data and construct a data set based on the real-time data; wherein the real-time data includes environmental data, electrochemical information and uranium removal activity; the environmental data includes temperature, pH and conductivity, the electrochemical information includes current and voltage, and the uranium removal activity includes removal rate and kinetic k value;

[0020] Cleaning the real-time data, removing outliers and noise, and normalizing the data to obtain a normalized data set;

[0021] Temperature, pH, conductivity, current, voltage, removal rate and kinetic k value were used as factors, the Pearson correlation coefficient was used to evaluate the correlation between the factors, and principal component analysis was used to reduce the dimension of the normalized data set to extract the key features and environmental factors affecting uranium removal as a feature database;

[0022] 80% of the data in the feature database were randomly selected as the training set, and 20% of the data were selected as the test set. A recurrent neural network (LSTM) was used to build a reactor uranium removal prediction model. The training set was used to train the reactor uranium removal prediction model, and the test set was used to evaluate the prediction performance of the reactor uranium removal prediction model. The standard deviation, root mean square error, and R 2 Analyze the model’s predictive accuracy;

[0023] In each iteration of the reactor uranium removal prediction model, by learning historical data and real-time data changes, a simplified but accurate machine learning model is finally established to predict the optimal working state of the electrode;

[0024] The operating parameters are determined according to the optimal working state of the electrode, and control instructions are issued based on the operating parameters to adjust the working potential of the electrode and the speed of the peristaltic pump, so that the electrode operates according to the predicted optimal working state.

[0025] Preferably, in the above-mentioned electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery, the deflection angle of the anode baffle ranges from 30° to 60°, and the end of the angle extends to the bottom of the upstream chamber.

[0026] In a second aspect, a method for treating uranium-containing wastewater is provided, based on the electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to the first aspect, the method comprising:

[0027] The uranium-containing wastewater is pumped into the reactor box through the water inlet, the adjustable power supply is turned on, the working parameters are set to perform uranium electrosorption reduction, and the uranium product deposited on the surface of the cathode baffle is recovered; wherein the working parameters include:

[0028] The voltage range of each pair of electrodes was set to 1 to 10 V;

[0029] Hydraulic retention time, set to 8 to 48 hours;

[0030] The reflux ratio is set to 0.5~9.

[0031] The beneficial effects of the present invention are:

[0032] 1. Through the organic coupling of uranium directional adsorption and electrochemical reduction, the electrode integrates the three functions of conduction, adsorption and reduction. It is low-cost, pollution-free and suitable for treating various complex water qualities.

[0033] 2. The electrodes are modularly assembled, independently partitioned, and easily replaceable. Physical cleaning and polarity reversal strategies are used to achieve efficient and fast recovery of uranium products. In addition, the electrode modules can be operated independently or embedded in other processes, which is highly compatible.

[0034] 3. Comprehensively apply multiple types of sensors to monitor the operating status in real time. Through big data and data fusion technology, deeply analyze multi-dimensional operating indicators to realize intelligent equipment control and ensure safe and efficient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The overall structure diagram of an electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to an embodiment of the present invention is shown.

[0036] Figure 2 A diagram showing the treatment effect of the uranium-containing wastewater treatment electrode according to an embodiment of the present invention when it is not modified.

[0037] Figure 3 A diagram showing the treatment effect of uranium wastewater after amide oxime modified electrode according to an embodiment of the present invention is shown.

[0038] Reference numerals:

[0039] 1-reactor box; 2-cathode baffle; 3-cathode slot; 4-cathode rail; 5-anode baffle; 6-anode slot; 102-upflow chamber; 103-downflow chamber; 7-peristaltic pump; 8-flow meter; 9-water inlet; 10-water outlet; 11-reflux port; 12-reflux pipeline; 13-adjustable power supply; 14-current recorder; 15-potential recorder; 16-conductivity meter; 17-pH meter; 18-thermometer; 19-wire hole; 20-sample outlet; 21-brush roller. DETAILED DESCRIPTION

[0040] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0041] The specific implementation of the present invention is further described in detail below in conjunction with the drawings and examples.

[0042] Embodiment 1:

[0043] The embodiment of the present invention provides an electrochemical baffle device for treating uranium-containing wastewater and recovering uranium, such as Figure 1As shown, the electrochemical baffle device for uranium-containing wastewater treatment and uranium recovery includes a reactor box 1, an electric baffle and an adjustable power supply 13. At least one pair of electric baffles is arranged in the reactor box 1 to divide the reactor box 1 into a plurality of interconnected compartments, and a sample outlet 20 is arranged in each compartment; the electric baffle includes a cathode baffle 2 and an anode baffle 5, and the cathode baffle 2 divides the compartment into an upstream chamber 102 and a downstream chamber 103; a modification layer is arranged on the cathode baffle 2, and the modification layer is used for directional adsorption of uranyl ions; a brush roller 21 is arranged corresponding to the cathode baffle 2; a water inlet 9 and a reflux port 11 are arranged at one end of the reactor box 1, and a water outlet 10 is arranged at the other end, and the reflux port 11 is connected to the bottom of the water outlet side of the reactor box 1 through a reflux pipeline 12; the adjustable power supply 13 is electrically connected to the cathode baffle 2 and the anode baffle 5.

[0044] In this embodiment, the adjustable power supply 13 provides a voltage within a set range for a pair of cathode baffles 2 and anode baffles 5. The device takes a single-chamber double-electrode electrochemical reaction as the basic unit, and through electrode material modification, electrode configuration design and electrode arrangement optimization, the specific adsorption of functionalized electrode materials is efficiently coupled with the electrochemical in-situ reduction function. At the same time, the electrodes are embedded in a matrix, and have both diversion functions (optimizing hydraulic flow and mass transfer), so as to achieve efficient removal and resource recovery of uranium ions in wastewater. The device is used for the treatment of uranium-containing wastewater, without the need to add ion exchange resin materials and oxide inhibitors, and without the need for inert gas atmosphere protection, and can be operated in an air atmosphere at normal pressure and temperature. Through the diversion effect of the electrode, the uranium-containing wastewater flows through the basic reaction unit in sequence, and the hexavalent uranyl ions in the uranium mine wastewater are reduced to low-toxic, almost water-insoluble tetravalent uranium and enriched on the cathode. The elements in the wastewater are gradually reduced, and the electrodes can be easily replaced and efficiently recovered by polarity reversal. The collection of uranium products is convenient and easy, and does not affect the continuous operation of the system.

[0045] Exemplarily, the material of the cathode baffle 2 can be a noble metal material, a transition metal-based material, a carbon-based material, or an alloy material, and the modified layer (optional or absent) is a material represented by amide oxime having a directional adsorption capacity for uranyl ions. The material of the anode baffle 5 can be a noble metal material, a transition metal-based material, a metal oxide material, an alloy material, or a carbon-based material having good corrosion resistance and high oxidation potential.

[0046] In some embodiments, a cathode slot 3 and an anode slot 6 are provided on the inner side wall of the reactor box 1, wherein the cathode baffle 2 is movably provided in the cathode slot 3, and the anode baffle 5 is movably provided in the anode slot 6. The cathode slot 3 and the anode slot 6 play the role of fixing the cathode baffle 2 and the anode baffle 5.

[0047] In a further embodiment, a cathode rail 4 is provided inside the reactor housing 1, and a plurality of cathode baffles 2 are movably mounted on the cathode rail 4, and the volume ratio of the upstream chamber 102 and the downstream chamber 103 is adjusted by adjusting the position of the cathode baffle 2. When the cathode rail 4 is provided, the cathode slot 3 can limit the movable travel of the cathode baffle 2, and the cathode rail 4 has a fixing function. For example, when the cathode baffle 2 is movably arranged on the cathode rail 4 through a slider, a slider nut is provided corresponding to the slider, and the position of the cathode baffle 2 can be adjusted by loosening the slider nut. After adjusting to the target position, the slider nut is locked to fix the cathode baffle 2 at the target position.

[0048] In some embodiments, an adjustable power supply 13 is disposed at the top of the reactor box 1, and is connected to the cathode baffle 2 and the anode baffle line 5 through a wire hole 19 disposed on the reactor box 1. The adjustable power supply 13 is used to adjust the voltage of each pair of electrodes. The cathode baffle 2 and the anode baffle 5 included in a pair of electric baffles constitute a pair of electrodes.

[0049] It should be noted that the above setting position of the adjustable power supply 13 is only an example and does not constitute a limitation to the present invention. In other embodiments, the adjustable power supply 13 may also be set at other reasonable positions.

[0050] In some embodiments, power flow components are arranged corresponding to the water inlet, water outlet and return pipe. The power flow components are used to provide power for water inlet, water outlet and return respectively and collect water inlet volume, water outlet volume and return volume. The power flow components include a peristaltic pump 7 and a flow meter 8.

[0051] The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium also includes a data acquisition module, a control module and an execution module; wherein the data acquisition module includes a flow meter 8, a current recorder 14, a potential recorder 15, a conductivity meter 16, a pH meter 17 and a thermometer 18, and the execution module includes an adjustable power supply 13 and a peristaltic pump 7. The control module selects an existing device capable of receiving, processing and feeding back data, such as a processor.

[0052] A current recorder 15 is arranged on the loop formed by each pair of electrodes, the cathode baffle 2 is connected to the potential recorder 15, and the upflow chamber 102 is connected to the conductivity meter 16 and the pH meter 17. The probe of the thermometer 18 is arranged inside the reactor box 1, and the signal output ends of the flow meter 8, the current recorder 14, the potential recorder 15, the conductivity meter 16, the pH meter 17 and the thermometer 18 are connected to the signal input end of the control module, and the signal output end of the control module is connected to the signal input end of the adjustable power supply 13 and the peristaltic pump 7. The control module is used to analyze and process the corresponding data collected by the flow meter 8, the current recorder 14, the potential recorder 15, the conductivity meter 16, the pH meter 17 and the thermometer 18, adjust the operating parameters, and control the adjustable power supply 13 and the peristaltic pump 8 based on the adjusted operating parameters to optimize the wastewater treatment effect.

[0053] Specifically, the control module is used to obtain real-time data and construct a data set based on the real-time data; wherein the real-time data includes environmental data, electrochemical information and uranium removal activity; the environmental data includes temperature, pH and conductivity, the electrochemical information includes current and voltage, and the uranium removal activity includes removal rate and kinetic k value. It should be noted that environmental data, electrochemical information and uranium removal activity can be obtained directly through the data acquisition module, or simply processed based on the information collected by the data acquisition module using methods known in the art. For example, the removal rate can be calculated based on the flow data of the inlet and outlet, and the kinetic k value is a parameter that describes the relationship between the reaction rate and the concentration of the reactant. The real-time data is cleaned, outliers and noise are removed, and data is normalized to obtain a normalized data set; the correlation between factors is evaluated using the Pearson correlation coefficient, the normalized data set is reduced in dimension using principal component analysis, and key features and environmental factors affecting uranium removal are extracted as a feature database; 80% of the data in the feature database are randomly selected as a training set, and 20% of the data are selected as a test set; a reactor uranium removal prediction model is constructed using a recursive neural network (LSTM), the reactor uranium removal prediction model is trained using the training set, and the prediction performance of the reactor uranium removal prediction model is evaluated using the test set, and the standard deviation, root mean square error and R are calculated. 2 The prediction accuracy of the analysis model is analyzed; in each iteration of the reactor uranium removal prediction model, by learning historical data and real-time data changes, a simplified but accurate machine learning model is finally established to predict the optimal working state of the electrode. The operating parameters are determined according to the optimal working state of the electrode, and control instructions are issued based on the operating parameters to adjust the working potential of the electrode and the speed of the peristaltic pump, so that the electrode operates according to the predicted optimal working state, optimizes the treatment effect, reduces energy consumption, and ensures the continuity and stability of wastewater treatment.

[0054] In some embodiments, the deflection angle of the anode baffle 5 ranges from 30° to 60°, and the end of the angle extends to the bottom of the upstream chamber, thereby improving the flow guidance effect.

[0055] Embodiment 2:

[0056] The embodiment of the present invention provides an electrochemical baffle device for treating uranium-containing wastewater and recovering uranium, such as Figure 1 As shown, the electrochemical baffle device for treating uranium-containing wastewater and recovering uranium comprises a reactor housing 1, an adjustable power supply 13 and an electric baffle. Five compartments are arranged in the reactor housing 1, each compartment is provided with a cathode baffle 2 and an anode baffle 5. The cathode baffle 2 divides the compartment into an upstream chamber 102 and a downstream chamber 103, and the volume ratio of the upstream and downstream chambers can be set by the sliding guide rail 4 at the bottom of the cathode slot 3. A water inlet 9 and a reflux port 11 are arranged at one end of the reactor housing 1, and a water outlet 10 is arranged at the other end, and the reflux port 11 is connected to the bottom of the water outlet side of the reactor housing 1 through a reflux pipeline 12. The water inlet 9 and the reflux port 11 are both connected to a peristaltic pump 7 and a flowmeter 8. An adjustable power supply 13 is installed on the top of the reactor housing 1, and the adjustable power supply 13 is connected to the cathode baffle 2, the anode baffle 5, the current recorder 14, and the potential recorder 15 through the wire hole 19. In addition, each upflow chamber 102 is provided with a conductivity meter 16 and a pH meter 17, and a thermometer 18 is installed on the right side of the reactor box 1. Brush rollers 21 are installed on both sides of the cathode tank 3.

[0057] It should be noted that the difference between the device provided in Example 2 and Example 1 is that in Example 2, the size of the device and the size, material and preparation method of the core components are specifically given.

[0058] The external dimensions of the reactor are: length×width×height=44cm×16cm×19cm.

[0059] In this embodiment, a 0.5 mm thick titanium plate is used as the substrate material of the electric baffle, and the dimensions of the cathode titanium sheet (i.e., cathode baffle 2) are: length × width = 13.5 cm × 13.8 cm, and the dimensions of the anode titanium sheet (i.e., anode baffle 5) are: length × width = 15.8 cm × 14.8 cm, with a bending length of 2.8 cm and a bending angle of 45°. The titanium sheet is washed with isopropanol, acetone, 2% nitric acid, and ultrapure water for 20 minutes before use to remove surface stains, and dried at 60°C for standby use. The steps of amide oxime modification of the titanium sheet (i.e., cathode baffle 2 provided with a modification layer) are as follows: polyacrylonitrile, carbon black, and N, N-dimethylformamide are mixed in a mass ratio of 1:1:30, and stirred to form a uniform slurry. The titanium sheet was dip-coated with the slurry and air-dried on a hot plate at 70 °C, then 80 mg / ml hydroxylamine hydrochloride and 60 mg / ml sodium carbonate were added to 25 ml of water and kept in a water bath at 70 °C for 90 min, then washed with deionized water and dried in a vacuum oven at 80 °C.

[0060] Embodiment 3:

[0061] An embodiment of the present invention provides a method for treating uranium-containing wastewater. Based on an electrochemical baffle device for treating uranium-containing wastewater and recovering uranium provided in Example 2, the experimental HRT is set to 24h, and a gradient voltage is supplied. The voltages of five pairs of electrodes from inlet to outlet are 3.5V, 3.5V, 4.0V, 4.0V, and 4.5V, respectively, and the volume ratio of the upstream chamber to the downstream chamber is 3:1.

[0062] Figure 2 The uranium concentration change and removal rate of the influent water compared with the effluent water in the 1st to 5th compartments of the reactor. The uranium in the effluent water is stable at about 4.0 mg / L, and the uranium removal rate is stable at 47%. The removed uranium is enriched in the cathode, and the power consumption is 126 kWh / kgU.

[0063] After the electrode reaches the upper limit of the treatment, the brush roller 21 moves up and down, rotates to clean the uranium-containing deposits on the cathode surface, and then the reactor is injected with a sulfuric acid solution with a pH of 3, the power electrode is reversed, and the uranium that is not cleaned clean and dropped after cleaning is dissolved into the solution again, and the uranium-enriched solution is recovered through the bottom sample outlet 20, thereby achieving electrode cleaning and uranium resource recovery.

[0064] The present invention can be applied to the treatment of uranium-containing wastewater and heavy metal ion wastewater treatment industries such as mining, electroplating, electronics, metallurgy, battery production, metal surface treatment, printed circuit board manufacturing, precious metal processing, automobile manufacturing, etc.

[0065] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. An electrochemical baffle device for treating uranium-containing wastewater and recovering uranium, characterized in that: It includes a reactor box, an electric baffle and an adjustable power supply; At least one pair of electric baffles is arranged in the reactor box to separate the reactor box into a plurality of interconnected compartments, and each compartment is provided with a sample outlet; The electric baffle comprises a cathode baffle and an anode baffle, wherein the cathode baffle divides the compartment into an upstream chamber and a downstream chamber; a modification layer is arranged on the cathode baffle, and the modification layer is used for directional adsorption of uranyl ions; a brush roller is arranged corresponding to the cathode baffle; A water inlet and a reflux port are arranged at one end of the reactor box, and a water outlet is arranged at the other end, and the reflux port is connected to the bottom of the water outlet side of the reactor box through a reflux pipeline; The adjustable power supply is electrically connected to the cathode baffle and the anode baffle.

2. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 1, characterized in that: The modified layer is an amide oxime layer.

3. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 1, characterized in that: A cathode slot and an anode slot are arranged on the inner side wall of the reactor box; wherein the cathode baffle is movably arranged in the cathode slot, and the anode baffle is movably arranged in the anode slot.

4. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 3, characterized in that: A cathode rail is arranged inside the reactor box, and a plurality of cathode baffles are movably assembled on the cathode rail. The volume ratio of the upstream chamber and the downstream chamber can be adjusted by adjusting the position of the cathode baffles.

5. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 4, characterized in that: The adjustable power supply is arranged on the top of the reactor box and is connected to the cathode baffle and anode baffle lines through the wire holes set on the reactor box. The adjustable power supply is used to adjust the voltage of each pair of electrodes. The cathode baffle and anode baffle included in a pair of electric baffles constitute the pair of electrodes.

6. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 5, characterized in that: A current recorder is arranged on the loop formed by each pair of electrodes, the cathode baffle is connected to a potential recorder, and the upstream chamber is connected to a conductivity meter and a pH meter.

7. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 6, characterized in that: It also includes a power flow component, which is arranged corresponding to the water inlet, water outlet and return pipeline, and is used to provide power for water inlet, water outlet and return flow respectively and collect water inlet volume, water outlet volume and return volume. The power flow component includes a peristaltic pump and a flow meter.

8. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 7, characterized in that: It also includes a thermometer and a control module, wherein the probe of the thermometer is arranged inside the reactor box, the signal output ends of the thermometer, flow meter, current recorder, potential recorder, conductivity meter and pH meter are connected to the signal input end of the control module, the signal output end of the control module is connected to the signal input end of the adjustable power supply and the peristaltic pump, and the control module is used for: Acquire real-time data and construct a data set based on the real-time data; wherein the real-time data includes environmental data, electrochemical information and uranium removal activity; the environmental data includes temperature, pH and conductivity, the electrochemical information includes current and voltage, and the uranium removal activity includes removal rate and kinetic k value; Cleaning the real-time data, removing outliers and noise, and normalizing the data to obtain a normalized data set; Temperature, pH, conductivity, current, voltage, removal rate and kinetic k value were used as factors, the Pearson correlation coefficient was used to evaluate the correlation between the factors, and principal component analysis was used to reduce the dimension of the normalized data set to extract the key features and environmental factors affecting uranium removal as a feature database; 80% of the data in the feature database were randomly selected as the training set, and 20% of the data were selected as the test set. A recurrent neural network was used to build a reactor uranium removal prediction model. The training set was used to train the reactor uranium removal prediction model. The test set was used to evaluate the prediction performance of the reactor uranium removal prediction model. The standard deviation, root mean square error, and R were calculated. 2 Analyze the model’s predictive accuracy; In each iteration of the reactor uranium removal prediction model, by learning historical data and real-time data changes, a simplified but accurate machine learning model is finally established to predict the optimal working state of the electrode; The operating parameters are determined according to the optimal working state of the electrode, and control instructions are issued based on the operating parameters to adjust the working potential of the electrode and the speed of the peristaltic pump, so that the electrode operates according to the predicted optimal working state.

9. The electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to claim 1, characterized in that: The deflection angle of the anode baffle is in the range of 30° to 60°, and the end of the deflection angle extends to the bottom of the upstream chamber.

10. A method for treating uranium-containing wastewater, based on the electrochemical baffle device for treating uranium-containing wastewater and recovering uranium according to any one of claims 1 to 9, characterized in that: The method comprises: The uranium-containing wastewater is pumped into the reactor box through the water inlet, the adjustable power supply is turned on, the working parameters are set to perform uranium electrosorption reduction, and the uranium product deposited on the surface of the cathode baffle is recovered; wherein the working parameters include: The voltage range of each pair of electrodes was set to 1 to 10 V; Hydraulic retention time, set to 8 to 48 hours; The reflux ratio is set to 0.5~9.

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